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Table 4 Pearson correlation coefficient between the explanatory variables and specific REE leaching efficiency

From: Rare earths leaching from Philippine phosphogypsum using Taguchi method, regression, and artificial neural network analysis

 

C

T

t

SL ratio

La

0.955*

0.730*

− 0.269

0.053

Ce

0.956*

0.722*

− 0.240

0.063

Nd

0.918*

0.739*

− 0.151

0.014

Y

0.952*

0.681*

− 0.252

0.074

TREE

0.946*

0.720*

− 0.226

0.052

  1. *p < 0.01 to denote that the correlation is significant at the 99% confidence interval
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